Comprehensive Evaluation and Prediction of Ecological Environment Quality in Yangtze River Delta Region Based on PSR
Based on the ecological environment pressure-state-response(PSR)model,the construction of a comprehensive evaluation index system for ecological environment quality was carried out,and the coefficient of variation method was used to comprehensively evaluate the ecological environment quality of 27 cities in the central area of the Yangtze River Delta(YRD)region from 2011 to 2021,while the GM(1,1)model was used to predict the ecological environment quality of the YRD re-gion from 2022 to 2024.The ecological environmental quality of the central Yangtze River Delta region generally showed an in-creasing trend from 2011 to 2021,and also in terms of ecological status and ecological response,but the ecological environ-mental pressure is getting bigger and bigger.At the provincial level,the ecological environmental response in the central YRD region from 2011 to 2021 showed that Shanghai had the highest composite index;Jiangsu Province had the highest in terms of ecological environmental status;Anhui Province had the highest spatial characteristics of ecological environmental pressure,Shanghai had the lowest,and Zhejiang Province and Jiangsu Province were in the middle.At the city level,the top three in the comprehensive evaluation index of ecological environmental quality were Zhoushan,Chizhou,and Anqing in order,which was related to the environmental pressure caused by the level of industrial economic development.As predicted by the GM(1,1)model,the ecological environmental quality showed sed a general upward trend from 2022 to 2024.
central area of Yangtze River Deltaecological environment qualityPSR modelvariation coefficient method